Call me paranoid but after reading this thread it did raise some concerns for my 08... I remember hearing some abnormal ticking sounds just after my spark plugs were changed at 30K.. However it has since disappeared?..

At idle, the car makes all sorts of noises as Im sure all normal vehicles do... there is a slight ticking noise Im sure... but its not what the videos suggest (Random ; No rhythm)..

I am out of warranty... Should I be concerned?

I had the same concerns after the spark plug change hence the reason behind reviving the thread. But the ticking noise I heard have since disappeared and from the feedback from members who have listened to the YouTube video, all is well and healthy. Back to sleeping well again.